Note here that the the Torx screw near the left speaker assembly passes through the eyelet for the speaker first then through the eyeleft for the cooling fan. When putting in a replacement fan ensure that the fan eyelet is underneath the speaker eyelet.
The tape you peel up may no longer be sticky enough when putting it down on a replacement fan. I used some electrical tape cut to size to redo the seal.
Quote from lupuss:
in my version the left side rubber bumpers are locked in the casing of the MBP and you have to slide out the unit to the right
As were mine.